Super-Earths

Habitable worlds

Home planets

Water that contains an abundance of sodium ions

Water in its liquid state (notice or vapor)

Water that remains a constant temperature (with minimal variation)

All water on Mars would turn into vapor because Mars is too close to the Sun resulting in surface temperatures that exceed water's boiling point

There is no water on Mars in any form

Because Mars is small, it has less gravity and has lost its water to space

Planets without an atmosphere are in a vacuum, and liquid water is unstable in a vacuum (it boils away or freezes)

There is no such thing as a planet without an atmosphere

Water enters another state of matter (called hydrogrix) when present on planets without an atmosphere

It's atmosphere is nearly 100% carbon dioxide causing surface temperatures hot enough to melt lead (too hot for liquid water)

It lacks an atmosphere causing a vacuum-like environment in which no life is thought to be able to survive

Temperature varies so greatly between boiling hot and freezing cold, it's believed that no life forms could survive there